Basic Info.
Type
Vanadium Battery Stack
Product Description
Vanadium battery pact, VR battery stack , Vanadium battery ion exchange membrane For more , please kindly get conact with us. zchmichael at 163 dot come
zch5584.en.made-in-china.com
1 Product Introduction
VRFB battery full name is Vanadium Redox Flow Battery (shorted as VFB), which is a active substance in liquid state redox batter.
1.1 Application
r VRFB Battery Division is specialized in vanadium flow battery energy storage system and its key materials research, development, production, sales, related technical service and customized solution, which are widely used in field of power grid peak adjustment, solar photovoltaic systems, backup power, energy storage systems in remote areas, wind energy storage systems, and others.
Main products:Stack, Electrolyte, Battery management system, Energy storage system
1.2 Features
high efficiency
long service life
low cost
Standardization
Safety
Increasing single stack number and electrode area, to enlarge battery power
2. Technical Parameters
2.1 Working Principal
VFB battery separately stores different valence ions into the positive and negative tanks. When charge or discharge, through pump, electrolyte cycles from external tanks into the positive and negative chamber, and reacts oxidation and reduction at the electrode surface at the same time, to achieve the battery charge and discharge.
VFB Working Principal
2.2 Main Technical Parameters
Stack is the VFB battery core part. By integrating, series or parallel several stacks together, with electrolyte, then it can integrate larger energy storage system.
Our self-developed stack can meet client varied customized needs, currently finalized models of 1kw / 2kw / 5kw / 10kw / 25kw.
Finalized stack model parameters
Electrolyte is independent, stored in the external tanks, and can be adjusted by different volume, with following advantages:
Self-technology to produce high purity, high activity vanadium electrolyte
Finished 5m3/batch electrolyte production line construction
Customize
Electrolyte Technical Parameter(1.7mol)
Energy storage system
Vanadium redox flow battery energy storage system is mainly made up of power unit (stack module), energy storage unit (electrolyte and tanks), electrolyte transmission unit (pipelines, valves, pumps etc.) and battery management system (pressure, temperature, level monitor unit, charge and discharge device, and control parts).
Features:
☆ according to different input grid, can flexible adjust capacity and stack
☆ with over-charge protection, avoid system damage
☆ system running real-time monitoring, abnormal alarm
☆ remote monitoring, data query
☆ With a variety of operating modes, user can achieve one-key operation
Notice: VFB battery energy storage model can be customized according to specific requirements, while each kwh increase 50-60L electrolyte.
2.3 Working environment
Environment temperature:-10~45ºC
2.4 model selection preference
Energy is stored into the electrolyte, so by increasing electrolyte volume or improving density, both can increase capacity. That is, for same power output, the battery system capacity can be adjusted according to any specific requirements.
3. Ordering instructions
A. Needed power and capacity;
B. System input method and load type;
C. Working environment, temperature and installation environment;
D. Other special requirements.
4. Project Case
Big Pawer self-developed vrfb battery energy storage system has 12 project cases both in domestic and world market, among which is exported to India and Singapore with good feedback.
Guangzhou client 1kw4h system - used as developed material evaluation and concept display
Singapore university 2kw5h system - used as research and concept display
Sichuan client 1kw system - used as client self-produced electrolyte test evaluation
India university 1kw6h system - used as micro-grid research
Hunan client 5kw4h system - used as developed electrolyte long-time evaluation, concept display, plant supported energy storage system for solar-wind energy transfer, and wind-electricity transfer
1.5 Key Material1.5.1 Electrolyte
Electrolyte not only plays conductivity role, but also the carrier of active substance, which is a core part of the VFB battery system. When charging, the positive turns into V4.5+ from V3.5+ and negative turns into V2.5+ from V3.5+, while discharging, it is the opposite to achieve energy store. So, improving the electrolyte density is the effective way to improve battery stored energy.
1.5.2 Membrane
Ion-exchange membrane requires good electrical conductivity, good permeability, ion-selective and oxidation resistance, so the best choice is cation-exchange membrane which allows hydrogen ions through. Battery membrane usually adopts cation-exchange membrane, commonly used perfluorinated sulfonic acid type ion-exchange membrane. At present, our main use is DuPont's Nafion membrane, which is an optimum overall performance ion exchange membrane.
1.5.3 Electrode material
Due to the strong oxidation of VO2+ and strong acid of sulfuric acid, the electrode material used as in vanadium battery must have strong resistance to oxidation and acidity, low resistance, good electrical conductivity, high mechanical strength, good electrochemical activity characteristics. It is usually compounded of corrosion resistant polymer conductive plastics and electrode materials to form composite electrode with performance of small resistance, corrosion resistance, good activity and convenient assembly.
